Khan, Misbahul Ain, and Sabiha Rashid. 2009. “Selective Nitrations of 2-(1’-Phenylpyrazol-4’-Yl) Benzimidazoles: Nitrations of Pyrazoles”. Biological Sciences - PJSIR 52 (6):289-92. https://v2.pjsir.org/index.php/biological-sciences/article/view/568.